How many moles of water are produced from the reaction of 50.0g of methane (CH4)? CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)

Answer 1

Hello, Emma,

Given the balanced equation

CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (g)

we know that we'll get one mole CO₂ for every 1 mole CH₄. So let's calculate how many moles are in 50 g of CH₄ by dividing it's mass by it's molar mass (16 g/mole). I get 3.125 moles. The equation says we should get the same number of moles of CO₂, so set moles CO₂ = 3.125 moles. Then we can find the mass of CO₂ by multipying by the molar mass of CO₂ (44 g/mole). We should expect 138 grams of CO₂.

Wait, doesn't the planet already have enough?

Bob